发明名称 |
IMPLANTABLE CARDIAC STIMULATOR WITH POLARITY DETECTION FOR DETECTING ECTOPIC BEATS |
摘要 |
An implantable medical device (100) for electrically stimulating the heart to beat including a sense circuit (208, 218) for detecting cardiac electrical activity. The sense circuit includes a sense amplifier (210, 220), band pass filter (215, 225), and threshold detector (227, 240, 245). The threshold detector determines whether sensed cardiac electrical activity resulted from a normal heart beat or an ectopic beat such as a premature ventricular contraction. In a preferred embodiment latches in the threshold detector are activated by output pulses from a pair of comparators (240, 245). A positive comparator (240) produces an output pulse upon detection of cardiac electrical activity exceeding a positive threshold voltage and a negative comparator (245) produces an output pulse upon detection of cardiac electrical activity more negative than a negative threshold. Threshold logic (250) produces output signals indicative of which comparator first produced an output pulse. A logic and control unit monitors the output signals from the threshold logic and thus determines whether the associated cardiac electrical activity represented a normal heart beat or resulted from an ectopic beat so that appropriate pacing may be provided by the implantable device.
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申请公布号 |
CA2285614(A1) |
申请公布日期 |
1998.10.22 |
申请号 |
CA19982285614 |
申请日期 |
1998.04.13 |
申请人 |
INTERMEDICS INC. |
发明人 |
WOODSON, DRURY III;PAUL, PATRICK J.;BRULS, ANNETTE;VANDEGRIFF, JOSEPH;VERBOVEN, YVES;ROUTH, ANDRE |
分类号 |
A61N1/37;A61N1/362;A61N1/39;(IPC1-7):A61N1/368 |
主分类号 |
A61N1/37 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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